The presentation in line with common government practice was made by CIA Director John Ratcliffe, Secretary of State Marco Rubio, Defense Secretary Pete Hegseth and Joint Chiefs of Staff Chairman Dan Caine.
“The briefing raised more questions than it answered," Democratic Senate minority leader Chuck Schumer said baldly.
Democratic Senator Chris Murphy said he left the briefing unsure about whether the US President Donald Trump was telling the truth and urged talks.
"Ultimately, the only way to truly constrain Iran's nuclear program is diplomacy. You cannot bomb knowledge out of existence. No matter how many scientists you kill, there are still people in Iran who know how to work centrifuges," he told reporters.
"To me, it still appears that we have only set back the Iranian nuclear program by a handful of months," the Connecticut lawmaker added.
"I just do not think the President was telling the truth when he said this program was obliterated. There's certainly damage done to the program, but there is still significant remaining capability."